$35 Cheap flight deals from Denver (DEN) to Union (STL)
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This Weekend's Flight Deals from Denver to Union
This weekend's flight prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.
Airfares from $35 One Way, $68 Round Trip from Denver to Union
Prices starting at $68 for return flights and $35 for one-way flights to Union were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.
Union economy flight packages
The Wildwood Hotel
Oct 13 - Oct 16
Denver (DEN) to St. Louis (STL)
St. Louis (STL) to Denver (DEN)
Reviewed on Aug 30, 2026
The Cheshire
Oct 10 - Oct 13
Denver (DEN) to St. Louis (STL)
St. Louis (STL) to Denver (DEN)
Reviewed on Aug 31, 2026
More About Flying To Union from Denver
Route Information for Flights from Denver to Union
Origin Airport IATA Code | DEN |
|---|---|
Destination Airport IATA Code | STL |
Distance | |
Direct Flight Airlines | |
Earliest Flight Arrival | |
Latest Flight Arrival |
Denver to Union
Orbitz gives you great deals on your flights from Denver to Union. If you also need a discount car rental or a cheap hotel room after you arrived at your destination, Orbitz has you covered.
We Offer Great Travel Deals and Discounts
When you book flights from Denver to Union with Orbitz for, you can be assured that you are getting the lowest price possible. Orbitz works constantly with our airline partners to ensure guaranteed low prices on Denver to Union flights for your trip—whether you are traveling for business or for fun with your family.
Enjoy Savings on Last-Minute Flights
If you are looking for a discount price on last-minute flights from Denver to Union, chances are that Orbitz can offer you a deal that will save you lots of money. Whether you just want to get away for the weekend or go on a vacation lasting weeks, Orbitz can help you find the best deals on Denver to Union flights that fit your budget and your itinerary for the perfect trip.
Full-Service Mobile Apps
Need more mobility when it comes to travel planning? Orbitz has easy-to-use mobile apps for iPhone, iPad, and Android, to help the traveler on the go. Not only can use the apps to find huge savings on Denver to Union flights wherever you are, but you can also check out and book discount hotel rooms too. The apps will also keep you up-to-date when it’s time to fly. Get easy access to your itinerary for flights from Denver to Union and review gate and baggage claim details too.
Flights from Denver
- Denver to Chicago
- Denver to Los Angeles
- Denver to Orlando
- Denver to Houston
- Denver to Dallas
- Denver to New York
- Denver to Miami
- Denver to Minneapolis - St. Paul
- Denver to Atlanta
- Denver to London
- Denver to Toronto
- Denver to Austin
- Denver to Kansas City
- Denver to Charlotte
- Denver to Detroit
- Denver to San Francisco
- Denver to Montreal
- Denver to Santa Ana
- Denver to Buenos Aires
- Denver to Edmonton
Union Airports
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Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.
Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.
Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.